Improvement in spike-pullers



A. F. JACKSON.

Spike-Pullers.

Patented April 28,1874.

AWUH

@WITNZffS ATTORNEYS.

UNITED STATES PATENT OFFICE.

AMBROSE F. JACKSON, OF MINNEAPOLIS, MINNESOTA.

IMPROVEMENT IN SPIKE-PULLERS.

Specification forming part of Letters Patent No. 1 56,324, dated April 28, 1874; application filed March 7, 1874.

To all whom it may concern I Be it known that I, AMBROSE F. J AOKSON, of Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and valuable Improvement in Spike-Puller; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure '1 of the drawing is a representation" of a sectional view of my spike-puller. Fig. 2 is a side view, and Fig. 3-is an end view, of the same.

This invention has relation to means for extracting spikes from railway-ties and other places; and it consists mainly in constructing the fulcrum-block in two sections, arranged one in rear of the other, pivoted together, and each provided with a fulcrum-pin, in connection with a suitable jaw and lever, as hereinafter more fully described. It is an improvement upon my double-fulcrum spike-extractor, for which Letters Patent N 0. 140,371 were granted, dated July 1, 1873.

In the accompanying drawings, the letterA designates the lever, upon which the jaw B may be formed, or to which it may be secured by a suitable clip or other fastening, as indicated at Gin the drawings. D representsthe fulcrum-block, formed in two sections, E and F, respectively arranged one in front of the other. To the front section, E, the lower end a of the lever, which is made quite broad, is pivoted by the pin 1) or other suitable means. At its base it extends forward somewhat, and the toe thus formed is notched at c, to make way for the body of the spike when the lever is brought down and the section E raised. From the rear end of the section E extends an arm, (Z, which is pivoted to the rear section F, and which serves, by its upper convex edge e, as a bearin g for the lower edge f of the broad portion of the lever when the latter is sutficiently depressed. The section F is also designed usually to extend forward a little at its base, and, being fitted neatly to the rear portion or face of the section E, aids in supporting it under pressure. Thepin h, by which the sections are connected, is lower in position than the fulcrum b of the front section, and the latter is placed, by this construction, sufficiently low to give a short bite to the jaw in starting the spike.

The operation of this device is as follows: The sections E and F are brought .together, with their bases in the same plane, or as nearly so as the inequalities of the tie or other location of the fulcrum-block will permit. The lever is then brought into the vertical position, and the jaw engaged with the head of the spike. Upon depressing the lever the spike is slowly raised from its bed for a short distance in a line nearly vertical, but curved a little forward on a circle having its center at the fulcrum I). Then the bearing of the lever is transferred from the fulcrum b to the fulcrum h, which is now in line, or nearly so, with the fulcrum b and the head of the spike, and, the lever being depressed, the spike is quickly extracted for the remainder of its length upon a curve which is of greater radius, and tangent, or nearly so, to the curve upon which the commencement of its extraction was offected these are, however, of small curvature, and the spike is drawn out in very nearly a Vertical direction.

What I claim as new, and desire to secure by Letters Patent, is

The combination, with the jawed lever A, of the sectional double-fulcrum block D, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

AMBROSE F. JACKSON.

Witnesses:

L. M. STEWART, A. F. ELLIOT. 

